随钻仪器电路舱壁面温度边界数值研究

深层、超深层是油气资源的重要接替区。但是，地层高温使得常规随钻仪器电路系统可靠性下降、寿命缩短，甚至发生失效，严重制约了油气资源的勘探开发，而增加降温装置是提高常规随钻仪器电路系统耐温指标的措施之一。本文以随钻仪器电路舱壁面温度边界为研究对象，建立带降温装置的随钻仪器物理模型，通过数值方法研究不同参数对电路舱壁面温度边界的影响，为后续精确计算高温井筒传递给随钻仪器电路系统的传热量，进而合理设计随钻仪器电路系统降温装置制冷量参数提供理论依据。

Numerical Study on the Temperature Boundary of the Circuit Bulkhead Surface of the Instrument While Drilling

Deep and ultra-deep reservoirs are important sources of oil and gas resources. However, the electrical circuitry of conventional MWD instruments loses its efficiency and durability, and sometimes even fails to function under the high temperatures experienced, which ultimately has a serious impact on the smooth exploration and development of deep and ultra-deep oil and gas resources. In this case, the use of a cooling device could make the MWD instrument circuitry more resistant to high temperatures. The purpose of this study is to investigate the temperature boundary of the circuit housing wall surface of an MWD instrument and then to create a physical model of an MWD instrument equipped with a cooling device. The effect of changing the parameters of the temperature boundary is studied through numerical methods so as to provide a theoretical basis for accurate calculation of the heat transferred from a high-temperature wellbore to the electrical circuitry of an MWD instrument, and in turn for assessing reasonable cooling parameters to be applied to such a device.